As second-hand smoking is more harmful and dangerous, people want a total against smoking in public．
A. ban
B. brake
C. breakthrough
D. boundary
网友回答
(答案→)A. ban
B. brake
C. breakthrough
D. boundary
解析：考查名词辨析：句意：因为二手烟更有害更危险，人们想完全禁止公共场合抽烟。A．ban禁止， B．brake刹车，C．breakthrough突破，D．boundary边界，选A。